<!doctype html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Bootstrap demo</title>
  <!-- 引入CSS -->
  <link href="bootstrap/css/bootstrap.min.css" rel="stylesheet">
</head>

<body>
  <div class="container mt-3">
    <div class="accordion" id="accordionExample">
      <div class="accordion-item">
        <h2 class="accordion-header" id="headingOne">
          <button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne"
            aria-expanded="true" aria-controls="collapseOne">
            Accordion Item #1
          </button>
        </h2>
        <div id="collapseOne" class="accordion-collapse collapse show" aria-labelledby="headingOne"
          data-bs-parent="#accordionExample">
          <div class="accordion-body">
            <strong>This is the first item's accordion body.</strong>
          </div>
        </div>
      </div>
      <div class="accordion-item">
        <h2 class="accordion-header" id="headingTwo">
          <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse"
            data-bs-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
            Accordion Item #2
          </button>
        </h2>
        <div id="collapseTwo" class="accordion-collapse collapse" aria-labelledby="headingTwo"
          data-bs-parent="#accordionExample">
          <div class="accordion-body">
            <strong>This is the second item's accordion body.</strong>
          </div>
        </div>
      </div>
      <div class="accordion-item">
        <h2 class="accordion-header" id="headingThree">
          <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse"
            data-bs-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
            Accordion Item #3
          </button>
        </h2>
        <div id="collapseThree" class="accordion-collapse collapse" aria-labelledby="headingThree"
          data-bs-parent="#accordionExample">
          <div class="accordion-body">
            <strong>This is the third item's accordion body.</strong>
          </div>
        </div>
      </div>
    </div>


    <!-- 引入JS -->
    <script src="bootstrap-5.2.3-dist/js/bootstrap.min.js"></script>
</body>

</html>